Search for Low-Mass Weakly Interacting Massive Particles with SuperCDMS.

Authors :: Agnese, R.
Anderson, A. J.
Asai, M.
Balakishiyeva, D.
Basu Thakur, R.
Bauer, D. A.
Beaty, J.
Billard, J.
Borgland, A.
Bowles, M. A.
Brandt, D.
Brink, P. L.
Bunker, R.
Cabrera, B.
Caldwell, D. O.
Cerdeno, D. G.
Chagani, H.
Chen, Y.
Cherry, M.
Cooley, J.
Source :: Physical Review Letters. 6/20/2014, Vol. 112 Issue 24, p241302-1-241302-6. 6p.
Publication Year :: 2014
Abstract: We report a first search for weakly interacting massive particles (WIMPs) using the background rejection capabilities of SuperCDMS. An exposure of 577 kg days was analyzed for WIMPs with mass < 30 GeV/c2, with the signal region blinded. Eleven events were observed after unblinding. We set an upper limit on the spin-independent WIMP-nucleon cross section of 1.2 × 10-42 cm2 at 8 GeV/ c2. This result is in tension with WIMP interpretations of recent experiments and probes new parameter space for WIMP-nucleon scattering for WIMP masses < 6 GeV/c2. [ABSTRACT FROM AUTHOR]